Not good! Have been using the D3323 since the first oil change. Without a hitch. Will be keeping a 'closer eye' now. Here's to hoping, if it was a production problem, it was a one time, and limited one.

I got a response from Bosch. They said the filter was designed for cars not bikes. This was my response. I think it about covers it.

Thanks Raymond, but I've been around automotive products for a few days, more like 50 years. That filter cross references about a dozen other filters from Wix, Purolator, Mobil 1, etc, etc. Unlike cartridge filters, spin on's fit lots of vehicles. Those other filters that the 3323 and D3323 match, have worked on five motorcycles and three cars I have owned. The majority of motorcycle spin of filters are car filters. What this means to me is that the Bosch filters have some loose manufacturing specs when it comes to the container of the filter. That was especially true on my first issue with the D3323. You could measure the difference between the threads and the rubber seal on the defective one and the rest of the filters on the shelf. I'll be passing this information on to the MC community.

I got a response from Bosch. They said the filter was designed for cars not bikes. This was my response. I think it about covers it.

Thanks Raymond, but I've been around automotive products for a few days, more like 50 years. That filter cross references about a dozen other filters from Wix, Purolator, Mobil 1, etc, etc. Unlike cartridge filters, spin on's fit lots of vehicles. Those other filters that the 3323 and D3323 match, have worked on five motorcycles and three cars I have owned. The majority of motorcycle spin of filters are car filters. What this means to me is that the Bosch filters have some loose manufacturing specs when it comes to the container of the filter. That was especially true on my first issue with the D3323. You could measure the difference between the threads and the rubber seal on the defective one and the rest of the filters on the shelf. I'll be passing this information on to the MC community.

Thanks for sharing. I contacted them as well with the picture of both concave and convex and never got a response.

I don't have near the expertise a lot of you guys do, so I've always been a little hesitant to use a filter just because it fits. When I decided to use Wix I went to their web page and looked up the filter for my bike. If it hadn't been there, I'd have done something else.

Hey dog,
Good write up, but how often do you think ya need to do something like that? My 2014 was on its third change when I dumped it the other day. Old oil was in there between 3 and 4K. It was dark brown but it sure wasn't like chocolate milk. Yes, the man said there is maybe a quart of oil lurking inside that engine. That sounds like a lot, maybe not. But in any event the new stuff will wash out the old. If your anal about oil like me get good stuff and change filters every time you change oil. Oh, BTW, oil will change colors to a dark brown because of the heat of the engine. Ever think we just might worry about oil too much????

Note: pretty soon I'll be going to 8K oil changes. This change was a preemptive strike because I'm going to do some rides where the miles will accumulate when I'm in no man's land and don't want to be thinking about changing oil or tires or other stuff.

I was sort of wondering how you'd get all the kerosene out if there's still a quart of liquid in the engine after draining.

please read carefully
this is NOT complicated at all .................

when you shut your engine down there is a residual amount left up near valves etc
not much at all actually in most engines a cup or less
if NO gunk / varnish / sludge
that residual cup UP IN the engine should NOT cause issues
later when new GOOD oil starts to circulate

NEVER run old bad oil back up into the engine ! ! ! ! ! !! !

by running HOT oil down a metal funnel into the sump
it will melt the old oil
by using MORE than whats in there it will also usually
be high enuf to touch the pump

Hey dog,
Good write up, but how often do you think ya need to do something like that? My 2014 was on its third change when I dumped it the other day. Old oil was in there between 3 and 4K. It was dark brown but it sure wasn't like chocolate milk. Yes, the man said there is maybe a quart of oil lurking inside that engine. That sounds like a lot, maybe not. But in any event the new stuff will wash out the old. If your anal about oil like me get good stuff and change filters every time you change oil. Oh, BTW, oil will change colors to a dark brown because of the heat of the engine. Ever think we just might worry about oil too much????

Note: pretty soon I'll be going to 8K oil changes. This change was a preemptive strike because I'm going to do some rides where the miles will accumulate when I'm in no man's land and don't want to be thinking about changing oil or tires or other stuff.

No disrespect intended but aren't we pole vaulting over mouse turds here ? Are we really considering the prospect of running kerosene through an engine and measuring temperatures etc ?

No doubt that the engine would be squeaky clean but isn't the goal here to find REASONABLE solutions to our problems ?

Guys get 200k-300k out of these engines by just changing the oil with good quality oil at twice the recommended interval.

I get the desire to do everything "perfectly" but man, seriously ?

The answer to your inquiry "how often do you think ya need to do something like that?", respectfully, the answer is a NEVER ...

If any bike ever needs that level of maintenance, I'm finding a new hobby ...

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